{"group":{"id":1,"name":"Community","lockable":false,"created_at":"2012-01-18T18:02:15.000Z","updated_at":"2026-04-06T14:01:22.000Z","description":"Problems submitted by members of the MATLAB Central community.","is_default":true,"created_by":161519,"badge_id":null,"featured":false,"trending":false,"solution_count_in_trending_period":0,"trending_last_calculated":"2026-04-06T00:00:00.000Z","image_id":null,"published":true,"community_created":false,"status_id":2,"is_default_group_for_player":false,"deleted_by":null,"deleted_at":null,"restored_by":null,"restored_at":null,"description_opc":null,"description_html":null,"published_at":null},"problems":[{"id":1372,"title":"Miles to go before I sleep","description":"Recently, my car's odometer passed 56789.  Given an odometer reading, output how many miles need to be driven to get the next mileage made up of consecutive increasing numbers.  If the mileage is already made up of consecutive digits, output 0.\r\n\r\nUse the digits 0-9 only.  For example, if your odometer is at 67903 miles, your script should output 10998, which is the number of miles needed to reach 78901 (7-8-9-0-1), rather than 78910 (7-8-9-10).\r\n\r\nYou may need to increase the number of digits in your odometer reading to accomplish this task.  For example, a reading of 9843 means that you will need to travel 2502 miles to get to 12345.  However, a reading of 9011 needs only one more mile to get to 9012.","description_html":"\u003cp\u003eRecently, my car's odometer passed 56789.  Given an odometer reading, output how many miles need to be driven to get the next mileage made up of consecutive increasing numbers.  If the mileage is already made up of consecutive digits, output 0.\u003c/p\u003e\u003cp\u003eUse the digits 0-9 only.  For example, if your odometer is at 67903 miles, your script should output 10998, which is the number of miles needed to reach 78901 (7-8-9-0-1), rather than 78910 (7-8-9-10).\u003c/p\u003e\u003cp\u003eYou may need to increase the number of digits in your odometer reading to accomplish this task.  For example, a reading of 9843 means that you will need to travel 2502 miles to get to 12345.  However, a reading of 9011 needs only one more mile to get to 9012.\u003c/p\u003e","function_template":"function y = miles2go(x)\r\n  y = x;\r\nend","test_suite":"%%\r\nx = 12345; y_correct = 0; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 67903; y_correct = 10998; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 9012; y_correct = 0; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 9013; y_correct = 3332; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 9011; y_correct = 1; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 67878; y_correct = 12; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 98765; y_correct = 24691; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 9843; y_correct = 2502; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 7903; y_correct = 998; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 2345677; y_correct=1; assert(isequal(miles2go(x),y_correct));\r\n","published":true,"deleted":false,"likes_count":7,"comments_count":0,"created_by":1615,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":38,"test_suite_updated_at":"2014-09-25T13:30:01.000Z","rescore_all_solutions":true,"group_id":1,"created_at":"2013-03-21T18:31:47.000Z","updated_at":"2025-12-08T13:39:41.000Z","published_at":"2013-03-21T18:34:37.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eRecently, my car's odometer passed 56789. Given an odometer reading, output how many miles need to be driven to get the next mileage made up of consecutive increasing numbers. If the mileage is already made up of consecutive digits, output 0.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eUse the digits 0-9 only. For example, if your odometer is at 67903 miles, your script should output 10998, which is the number of miles needed to reach 78901 (7-8-9-0-1), rather than 78910 (7-8-9-10).\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eYou may need to increase the number of digits in your odometer reading to accomplish this task. For example, a reading of 9843 means that you will need to travel 2502 miles to get to 12345. However, a reading of 9011 needs only one more mile to get to 9012.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"},{"id":44637,"title":"Still more miles to go before I sleep","description":"It's time for more odometer fun.  Last problem, my car's odometer hit 56789.  It's coming up on 111111 now, which (barring a major miracle) will be the last binary number to ever show up on the odometer.  You will be given two numbers - an odometer reading, and a number base.  Calculate the number of miles your car will need to travel in order to show the next number that is valid in that base.  If your odometer reading is already a valid number in that base, return 0.\r\n\r\nFor example, your input is an odometer reading of 12341 with a number base of 4.  The next odometer reading that would be valid in base 4 is 13000, so the correct answer would be 13000-12341, or 659.\r\n\r\nYou can assume that the odometer reading is in base 10, the input is numerical and not a string, all numbers will be positive integers, and that your car will last that long without getting read-ended at a stop-light.  Happy driving!","description_html":"\u003cp\u003eIt's time for more odometer fun.  Last problem, my car's odometer hit 56789.  It's coming up on 111111 now, which (barring a major miracle) will be the last binary number to ever show up on the odometer.  You will be given two numbers - an odometer reading, and a number base.  Calculate the number of miles your car will need to travel in order to show the next number that is valid in that base.  If your odometer reading is already a valid number in that base, return 0.\u003c/p\u003e\u003cp\u003eFor example, your input is an odometer reading of 12341 with a number base of 4.  The next odometer reading that would be valid in base 4 is 13000, so the correct answer would be 13000-12341, or 659.\u003c/p\u003e\u003cp\u003eYou can assume that the odometer reading is in base 10, the input is numerical and not a string, all numbers will be positive integers, and that your car will last that long without getting read-ended at a stop-light.  Happy driving!\u003c/p\u003e","function_template":"function y = miles2(r,b)\r\n  y = dec2base(r,b);\r\nend","test_suite":"%%\r\nr=12341;b=4;\r\nassert(isequal(miles2(r,b),659))\r\n%%\r\nr=12341;b=2;\r\nassert(isequal(miles2(r,b),87659))\r\n%%\r\nr=12331;b=4;\r\nassert(isequal(miles2(r,b),0))\r\n%%\r\nr=455555;b=5;\r\nassert(isequal(miles2(r,b),544445))\r\n%%\r\nr=23907515;b=5;\r\nassert(isequal(miles2(r,b),92485))\r\n%%\r\nr=23807515;b=8;\r\nassert(isequal(miles2(r,b),192485))\r\n%%\r\ns=zeros(1,10);\r\nfor b=2:10\r\n    s(b)=miles2(123456789,b);\r\nend\r\nassert(isequal(sum(s),960219488))\r\n%%\r\ns=zeros(200,10);\r\nfor b=2:10\r\n    for r=1:200\r\n        s(r,b)=miles2(r,b);\r\n    end\r\nend\r\nassert(isequal(sum(s(:)),96940))","published":true,"deleted":false,"likes_count":7,"comments_count":0,"created_by":1615,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":55,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2018-05-14T13:42:15.000Z","updated_at":"2026-03-20T13:46:45.000Z","published_at":"2018-05-14T13:42:15.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eIt's time for more odometer fun. Last problem, my car's odometer hit 56789. It's coming up on 111111 now, which (barring a major miracle) will be the last binary number to ever show up on the odometer. You will be given two numbers - an odometer reading, and a number base. Calculate the number of miles your car will need to travel in order to show the next number that is valid in that base. If your odometer reading is already a valid number in that base, return 0.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eFor example, your input is an odometer reading of 12341 with a number base of 4. The next odometer reading that would be valid in base 4 is 13000, so the correct answer would be 13000-12341, or 659.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eYou can assume that the odometer reading is in base 10, the input is numerical and not a string, all numbers will be positive integers, and that your car will last that long without getting read-ended at a stop-light. Happy driving!\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"}],"problem_search":{"errors":[],"problems":[{"id":1372,"title":"Miles to go before I sleep","description":"Recently, my car's odometer passed 56789.  Given an odometer reading, output how many miles need to be driven to get the next mileage made up of consecutive increasing numbers.  If the mileage is already made up of consecutive digits, output 0.\r\n\r\nUse the digits 0-9 only.  For example, if your odometer is at 67903 miles, your script should output 10998, which is the number of miles needed to reach 78901 (7-8-9-0-1), rather than 78910 (7-8-9-10).\r\n\r\nYou may need to increase the number of digits in your odometer reading to accomplish this task.  For example, a reading of 9843 means that you will need to travel 2502 miles to get to 12345.  However, a reading of 9011 needs only one more mile to get to 9012.","description_html":"\u003cp\u003eRecently, my car's odometer passed 56789.  Given an odometer reading, output how many miles need to be driven to get the next mileage made up of consecutive increasing numbers.  If the mileage is already made up of consecutive digits, output 0.\u003c/p\u003e\u003cp\u003eUse the digits 0-9 only.  For example, if your odometer is at 67903 miles, your script should output 10998, which is the number of miles needed to reach 78901 (7-8-9-0-1), rather than 78910 (7-8-9-10).\u003c/p\u003e\u003cp\u003eYou may need to increase the number of digits in your odometer reading to accomplish this task.  For example, a reading of 9843 means that you will need to travel 2502 miles to get to 12345.  However, a reading of 9011 needs only one more mile to get to 9012.\u003c/p\u003e","function_template":"function y = miles2go(x)\r\n  y = x;\r\nend","test_suite":"%%\r\nx = 12345; y_correct = 0; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 67903; y_correct = 10998; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 9012; y_correct = 0; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 9013; y_correct = 3332; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 9011; y_correct = 1; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 67878; y_correct = 12; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 98765; y_correct = 24691; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 9843; y_correct = 2502; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 7903; y_correct = 998; assert(isequal(miles2go(x),y_correct));\r\n%%\r\nx = 2345677; y_correct=1; assert(isequal(miles2go(x),y_correct));\r\n","published":true,"deleted":false,"likes_count":7,"comments_count":0,"created_by":1615,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":38,"test_suite_updated_at":"2014-09-25T13:30:01.000Z","rescore_all_solutions":true,"group_id":1,"created_at":"2013-03-21T18:31:47.000Z","updated_at":"2025-12-08T13:39:41.000Z","published_at":"2013-03-21T18:34:37.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eRecently, my car's odometer passed 56789. Given an odometer reading, output how many miles need to be driven to get the next mileage made up of consecutive increasing numbers. If the mileage is already made up of consecutive digits, output 0.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eUse the digits 0-9 only. For example, if your odometer is at 67903 miles, your script should output 10998, which is the number of miles needed to reach 78901 (7-8-9-0-1), rather than 78910 (7-8-9-10).\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003cw:jc w:val=\\\"left\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eYou may need to increase the number of digits in your odometer reading to accomplish this task. For example, a reading of 9843 means that you will need to travel 2502 miles to get to 12345. However, a reading of 9011 needs only one more mile to get to 9012.\u003c/w:t\u003e\u003c/w:r\u003e\u003c/w:p\u003e\u003c/w:body\u003e\u003c/w:document\u003e\"},{\"partUri\":\"/matlab/output.xml\",\"contentType\":\"text/xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\" standalone=\\\"no\\\" ?\u003e\u003cembeddedOutputs\u003e\u003cmetaData\u003e\u003cevaluationState\u003emanual\u003c/evaluationState\u003e\u003clayoutState\u003ecode\u003c/layoutState\u003e\u003coutputStatus\u003eready\u003c/outputStatus\u003e\u003c/metaData\u003e\u003coutputArray type=\\\"array\\\"/\u003e\u003cregionArray type=\\\"array\\\"/\u003e\u003c/embeddedOutputs\u003e\"}]}"},{"id":44637,"title":"Still more miles to go before I sleep","description":"It's time for more odometer fun.  Last problem, my car's odometer hit 56789.  It's coming up on 111111 now, which (barring a major miracle) will be the last binary number to ever show up on the odometer.  You will be given two numbers - an odometer reading, and a number base.  Calculate the number of miles your car will need to travel in order to show the next number that is valid in that base.  If your odometer reading is already a valid number in that base, return 0.\r\n\r\nFor example, your input is an odometer reading of 12341 with a number base of 4.  The next odometer reading that would be valid in base 4 is 13000, so the correct answer would be 13000-12341, or 659.\r\n\r\nYou can assume that the odometer reading is in base 10, the input is numerical and not a string, all numbers will be positive integers, and that your car will last that long without getting read-ended at a stop-light.  Happy driving!","description_html":"\u003cp\u003eIt's time for more odometer fun.  Last problem, my car's odometer hit 56789.  It's coming up on 111111 now, which (barring a major miracle) will be the last binary number to ever show up on the odometer.  You will be given two numbers - an odometer reading, and a number base.  Calculate the number of miles your car will need to travel in order to show the next number that is valid in that base.  If your odometer reading is already a valid number in that base, return 0.\u003c/p\u003e\u003cp\u003eFor example, your input is an odometer reading of 12341 with a number base of 4.  The next odometer reading that would be valid in base 4 is 13000, so the correct answer would be 13000-12341, or 659.\u003c/p\u003e\u003cp\u003eYou can assume that the odometer reading is in base 10, the input is numerical and not a string, all numbers will be positive integers, and that your car will last that long without getting read-ended at a stop-light.  Happy driving!\u003c/p\u003e","function_template":"function y = miles2(r,b)\r\n  y = dec2base(r,b);\r\nend","test_suite":"%%\r\nr=12341;b=4;\r\nassert(isequal(miles2(r,b),659))\r\n%%\r\nr=12341;b=2;\r\nassert(isequal(miles2(r,b),87659))\r\n%%\r\nr=12331;b=4;\r\nassert(isequal(miles2(r,b),0))\r\n%%\r\nr=455555;b=5;\r\nassert(isequal(miles2(r,b),544445))\r\n%%\r\nr=23907515;b=5;\r\nassert(isequal(miles2(r,b),92485))\r\n%%\r\nr=23807515;b=8;\r\nassert(isequal(miles2(r,b),192485))\r\n%%\r\ns=zeros(1,10);\r\nfor b=2:10\r\n    s(b)=miles2(123456789,b);\r\nend\r\nassert(isequal(sum(s),960219488))\r\n%%\r\ns=zeros(200,10);\r\nfor b=2:10\r\n    for r=1:200\r\n        s(r,b)=miles2(r,b);\r\n    end\r\nend\r\nassert(isequal(sum(s(:)),96940))","published":true,"deleted":false,"likes_count":7,"comments_count":0,"created_by":1615,"edited_by":null,"edited_at":null,"deleted_by":null,"deleted_at":null,"solvers_count":55,"test_suite_updated_at":null,"rescore_all_solutions":false,"group_id":1,"created_at":"2018-05-14T13:42:15.000Z","updated_at":"2026-03-20T13:46:45.000Z","published_at":"2018-05-14T13:42:15.000Z","restored_at":null,"restored_by":null,"spam":false,"simulink":false,"admin_reviewed":false,"description_opc":"{\"relationships\":[{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/document\",\"relationshipId\":\"rId1\",\"target\":\"/matlab/document.xml\"},{\"relationshipType\":\"http://schemas.mathworks.com/matlab/code/2013/relationships/output\",\"relationshipId\":\"rId2\",\"target\":\"/matlab/output.xml\"}],\"parts\":[{\"partUri\":\"/matlab/document.xml\",\"relationship\":[],\"contentType\":\"application/vnd.mathworks.matlab.code.document+xml\",\"content\":\"\u003c?xml version=\\\"1.0\\\" encoding=\\\"UTF-8\\\"?\u003e\u003cw:document xmlns:w=\\\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\\\"\u003e\u003cw:body\u003e\u003cw:p\u003e\u003cw:pPr\u003e\u003cw:pStyle w:val=\\\"text\\\"/\u003e\u003c/w:pPr\u003e\u003cw:r\u003e\u003cw:t\u003eIt's time for more odometer fun. 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